Liquid-fuel-delivery apparatus



Jan. 17, 1928.

G. P. HAYNES LIQUID FUEL DELIVERY APPARATUS 'Filed Jan. 21. 1926 v2Sheets- Sheet 2 ATTORNEY Patenteddan. 17, 1928.

' UNITED STATES PATENT OFFICE.

GEORGE r. mums, or BROOKLYN, nnw YORK, ASSIGNOR T TODDJJRY DOCK nner-NEERING dc REPAIR :CORPORATION, OF BROOKLYN, NEW YORK.

LIQUm-Fp'EL-DELIVERY APPARATUS.

Application filed January 21, 1926. Serial 'No. 82,873.

vision be made whereby the quantity of llquid fuel dehvered may beregulated'within wide ranges to suit consumption needs,

' while maintaining efiicient atomization.

Under existing methods of delivery the quantity of liquid fuel atomizedcan be varied only within a relatively limited range by reducing-thepressure at which the fuel is supplied to the atomizer, because at toolow a pressure atomization will be imperfect.

It is present'day practice to equip atomizers with nozzles havingdelivery orifices of sizes best proportioned to" the service for whichthey are intended, but no satisfactory provision is made for increasingthe supply delivery range, without change of parts, to suit the greatflexibility in load requirements found in certain classes of service.

Therefore, my present invention was conceived for the purpose ofproviding a liquid fuel supply delivery apparatus whose flexibilitycomprehends the requirements of all practical load variations, withoutnecessitating any change in the equipment employed.

With these objects in view my, improved delivery apparatus is embodiedin a structure having an atomizing orifice for delivery of a main supplyof liquid fuel, and a smaller sized atomizing orifice rearwardly spacedfrom the main orifice for delivery of a secondary supply of liquid fuel,both orifices being arranged along the same longitudinal axis,and eachbeing having separate independent means of communication, to the endthat supplies of liquid fuel under different pressuresmay be directed tothe respective orifices.

Other features and advantages of my invention will hereinafter appear.

In the drawings Figure 1 is a side sectional view of my improveddelivery apparatus for liquid fuel, provided with separate atomizingmeans each having its own independent supply conduit. I

Fig. 2'is a section on the line 2 2 of Fig.

. Fig. 3 is a section on the line 3'-3 of Fig.

Fig. 4 is an enlarged sectionaldetail view taken along a broken line, ofthe nozzle elements in their assembled form.

Fig. 5 is a face view of the intermediary plate having the secondaryatomizer orifice and the collecting recess for liquid fuel passing tothe main. atomizing orifice.

Fig. 6 is a face view of the rearwar nozzle element-provided with meansof communication to the intermediary plate.

Fig. 7 is.a rear view of the rearward nozzle element, and

. 'Fig. .8 is a side section of said rearward nozzle element,.taken onthe line 8-8 of Fig; 6.

The delivery apparatus includes the usual air supply tube 1, which enages at its rear end with the housing 2 and as the deflector 3 providedat its forward end. An inner tube 4', in spaced relation within tube 1,engages at its rear end with the coupling memher 5, and at its forwardend has anatom- The structure thus far izer assembla e. described is sustantially according to usual practice in the Todd type of burner, thetube 4 serving asa duct to convey liquid fuel to the atomizer. Since,however, my invention comprehends the provision of two separate suppliesof liquid fuel to the atomizer, I place another or central tube 6 inspaced relation within tube 4, said tube 6 having separate means ofengagement with coupling member 5. The tube 4 is of larger ca-. pacitythan tube 6 and is termed by me the main supply tube, and the centraltube 6 I call the secondary supply tube.

Ehe nozzle structure comprises arearward element, an intermediaryelement and a forward circular plate or tip 7 provided with an atomizingorifice 8 for delivery of the main fuel supply. The rearward ele- -mentconsists of a tubular neck portion 9 form of a radial flange 12, that ispierced with a series of apertures 13. Also formation 11 has aconcentric groove 14 depressed in its face in communication withapertures 13. The intermediary element consists of a disk 15 providedwith a circumferential flange 16 that projects beyond both surfaces ofdisk 15, so that said flange ma encircle the closure formation 11 at onesi" e of disk 15, and may also encircle the atomizer plate 7 at theother side of said disk in the as- :embled relation of the elements. Therespective surfaces of disk 15 are identified by the letters a, b forconvenience of reference. Surface a lies flatly against the face offormation 11, thereby affording front closure means for groove 14,excepting that apertures 17, through disk 15, are in communication withgroove 14. The apertures 17 are arranged in a circle co-incidentto thecircular arrangement. of apertures 13, but are less in number torestrict outgo from closed groove 14., as a step in the operation ofbreaking up the fuel.

A central recess 18 is formed in face 6 of disk 15,serving as a pocketor chamber to receive the liquid fuel, which enters saidrecess by way ofslits 19 extended tangentially between the apertures 17 and theperipheral wall of the recess, the. liquid fuel being thus caused towhirl within recess 18 prepartory to its exit through the atomizingorifice 8 of forward plate" 7. The course provided through apertures 13,groove 14, apertures 17, slits 19, and chamber 18 to orifice 8 in plate7 is that taken by the main supply of liquid fuel conveyed by tube 4.

Also the closure formation 11 is pierced with apertures 20, smaller thanapertures 13 and extending from the interior of tube porameter thanorifice 8, wit

tion 9 to the face of formation 11, where they communicate, by means oftangential slits 21 with, a central pocket or chamber 22 recessed insaid formation 11, said pocket or chamber 22 being closed by the surfacea of disk 15, excepting for a central atomizing orifice 23therethroughil-of smaller dialigned for its discharge through plate 7.

The orifice 23 is so proportioned with respect to orifice 8 and sospaced therefrom that the atomized discharge from orifice 23 willapproximately clear orifice 8.

The course dprovided through a rtures 20, slits.21 an chamber 22 to orice 23 is that taken by the secondary supply of liquid fuel conveyed bytube 6.

' The assemblage of atomizer elements thus described is connected withthe supply tubes, to form a part of the delivery apparatus, in thefollowing manner;

Threaded upon the forward end of the main li uid fuel supply tube 4 isanan lar nut 24, em shown as rectangular and tted within air su ply tube1, leaving clearances 25 for the ow of air, said nut having a forwardtubular portion 26, exteriorly threaded for engagement by an annularinteriorly threaded cap 27, that is rovided with an inturned flange 28.As in be observed in Fig. 1, the atomizer elements lie between the'endof tubular portion, 26 and which it is' noses the flange 28, and areclam ed securely in place by screwing the cap tightly upon tubularportion 26.

The coupling member-t, which is secured vin operative position againstbushing 29 by housing screw 30 is here shown as provided with theseparate chambers 31, 32; tube 4 opening into chamber 31, and tube 6fitting into a central aperture-33, through coupling 5, which apertureopens into chamber 32. A passage 34 extendsoutwardly from chamber 31through the coupling member into communication with a passage 35 in thebushing, and connection is made with said passage by a supply pipe 36.,Similarly, a passage 37 extends outwardly from chamber 32 through thecoupling member into communication with a passage'38 in the bushing andconnection is made therewith by a supply pipe 39. p Now it will beapparent that'when only a relatively small flame is required to issuefrom the burner the main supply of liquid fuel, passing through tube 4to the larger atomizing'orifice 8, may be shut off entirely, leavingonly the secondary supply open to tube 6, for delivery througlr thesmaller atomizer orifice 23. It must be noted that the main andsecondary atomizing and delivery means are entirel separate' anddiatinct from each other, a though included in y the same apparatus; andthat said supplies can be delivered separately.

()rdinarily under service conditions the main supply will be in use andthe secondary supply shut off. But when less heat is to be generated theauxiliary supply will be turned on and the main supply s ut off. Aseither supply may be turned on before shutting off the other there needbe no flame extinguishment in effecting the change over. Variationswithin the spirit and scope of my invention are equally comprehended bythe foregoing disclosure.

I claim: a

1. A delivery. apparatus for 1i uid fuel provided with a pair ofatomizin nozzle members in longitudinally spaced relation, said membersrespectively including axially aligned discharge orifices of differentcrosssectional' area, the smaller orifice being cated rearwardl of thelarger orifice, and separate liquid uel supply means for each orificeoperable respectively for main and secondary liquid fuel supplies underdifferent pressuresgethe spaced relation between the nozzle mem rs beingsuch as to rmit the atomized discharge from the sma er orifice toapproximately clear the larger orifice.

2. A delivery apparatus for hquid fuel provided with a pair ofatomiz-ing nozzle 'members in longitudinally spaced relation,

said members respectively including axially aligned dischargfi orificesof diiferentcrosssectional area, e smaller-orifice being 10- catedrearwardly of the larger orifice, whirling chambers anterior said nozzlemembers respectively and separate liquid fuel supply means for eachchamber operable respectively for main and secondary liquid fuelsuppliesunder different pressures, the spaced relation between thenozzle members being such as to permit the atomized dischar e from thesmaller orifice to approximate y clear the larger orifice.

3. A delivery apparatus for liquid fuel provided with a pair of nozzlemembers in spaced relation, said members respectively provided withaxially aligned discharge orifices of different cross-sectional area,the smaller orifice being located rearwardly of the larger orifice,whirling chambers anterior 1 said nozzle members respectively,tangential inlet means respectively for said chambers, and separateliquid fuel supply means for the respective inlet means operablerespectively for main and secondary liquid fuel supplies under diflerentpressures, the spaced relaticnbetween the nozzle members and therelative size of said orifices being such as to permit individualatomization of the respective liquid fuel supplies.

' 4. A delivery apparatus for liquid (fuel forward face, and havingmeans of comjmunication therewith, and said tubular neck havingatomizing means which include a tip plate having an emission orifice, anintermediary disk lying rearwardly against said plate and having arecessed chamber, means of communication through said disk into saidchamber, a rearward disk lying against "said intermediary disk, saidrearward disk having a grooved chamber and means communicating therewithtocoact with the communicating means through the intermediary disk, atubular neck portion extended rearwardly from said rearward disk, saidintermediary disk provided with an emission orifice smaller than theorifice in the tip plate and in axial alignment therewith, said rearward disk having a chamber recessed'in its portion provided with meansof communication-with said last named communicating 7 means, a liquidfuel conveying tube, connectingmeans between said tube and the means ofcommunication through said rearward disk, and a second conveying tubewhich connects with said tubular neck portion.

- Executed this 14 day of January, 1926.

enonen animus.

